Wearing a respirator is not always comfortable. Drawing on years of experience in respiratory protection and user feedback, Honeywell has redefined the concepts of comfort, efficiency, and safety. Discover the new Honeywell North HM500 half mask series, designed as a lightweight, permanently soft half mask with easy handling. The PSS sets are available with the non-drop-down version HM501. Replacement bayonet filters are also available in PSS packaging. The Honeywell North bayonet filters compatible with the HM500 can be quickly and easily attached and locked in place. A quarter turn with a click gives you the assurance that the filters are securely locked, allowing you to work safely and productively.